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Consider the following statements.<br>1. In sound waves, the vibrations are perpendicular to the direction in which the wave travels.<br>2. Sound waves are elastic waves.<br>Which of the statement(s) given above is/are correct?

Correct Answer: Only 2

Consider the following statements.
1. A flute of smaller length produces waves of lower frequency.
2. Sound travels in rocks in the form of longitudinal elastic waves only.
Which of the statements given above is/are correct?

Statement I Sound waves cannot propagate in vacuum.
Statement II Sound waves are elastic waves and require a medium to propagate.

Which of the statements given above are correct?
1. P - waves are the first seismic waves to reach a place
2. S - waves travel only through liquids
3. Arrival time of P and S - waves is used to locate the epicentre
4. Richter scale is a logarithmic scale

Consider the following statements.
1. The demand for necessities in inelastic.
2. Demand for luxuries is elastic.
3. A product which has several uses has an elastic demand.
Which of the statement(s) given above is/are correct?

Which of the following statement is not true considering a cubic lattice system? are not perpendicular to each other b) Direction is parallel to plane (hkl), when uh+vk+wl=0 c) Direction is perpendicular to the plane (hkl) when u=h, v=k, w=l d) Two planes (hkl) and (abc) are perpendicular to each other if h=a, k=b, l=c

Which of the following are the characteristics of electromagnetic waves?
1. They are elastic waves.
2. They can also move in vacuum.
3. They have electric and magnetic components which are mutually perpendicular.
4. They move with a speed equal to 3 lakh meters per second.
Select the correct answer:

Consider the following statements.
1. Surface tension of liquid depends on length but not on the area, like the elastic property.
2. SI unit of surface tension is N/m.
3. Surface tension is a scalar quantity because it has no specific direction for a given liquid.
Which of the statement(s) given above is/are correct?

Consider the following statements: X. Two-dimensional stresses applied to a thin plater in its own plane represent the plane stress condition. Y. Normal and shear stresses may occur simultaneously on a plane. Z. Under plane stress condition, the strain in the direction perpendicular to the plane is zero. Which of the above statements are correct?

Directions: Seven different boxes A, B, C, D, E, F and G of different colours viz., Orange, Pink, Purple, Yellow, Blue, Red and Green are arranged one above the other. The box at the bottom of arrangement is numbered 1, the above box is numbered 2 and so on. B is immediately above E. More than two boxes are above the Orange box. The Yellow box is immediately below A. Only one box is between the Orange box and F. G is immediately above the Red box. Only one box is between B and the Pink box. Only two boxes are between the Pink and the Green box. Only two boxes are between the Yellow box and the Orange box. The Purple box is neither at the top nor at the bottom of the arrangement.B is above Pink box. C is immediately above F. Neither C nor G is a Yellow box. G is not a Orange box. Question: Which combination represents the position of C and its colour?

The waves, in which the particles of the medium vibrate in a direction perpendicular to the direction of wave motion, is known as __________